Improved rook drill



C. D. FOUTE.

ROCK DRILL.

No. 60,497. Patented' Dec. 18-186-6.

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IMPROV'ED ROOK DRILL.

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TO ALL WHOM IT MAY CONCERT:

Be it known that I, C. D. FOOTE, of Fond du Lac, in the county of Fonddu Lac, `and State of Wisconsin, have invented certain new and usefulimprovements in Drilling Machines; and I do hereby declare that the'following is afull, clear, and exact description thereof, referencebeing had to the accompanying drawings, making part of thisspecification, and to the letters of reference marked thereon, likeletters indicating like parts,-wl}erever they occur. To enable othersskilled in the art to construct and use the invention, I will proceed todescribe it.

My invention relates to that classof machines in which the drill fordrilling holes in rock and similar material is operated by an enginepropelled by compressed air or steam, and my invention consists in anovel construction and arrangement oit' the engine and its supports, formore perfectly accomplishing the desired object, as hereinafterexplained. I i l Figurel is a side elevation of the machine complete andready for use.

Figure 2 is a top plan view of the same.

Figure 3 is a transverse vertical section taken on the line :u x, oi'iig. l.

Figure 4 is a front end view, with the engine swung partially out ofposition on its frame.

Alrepresents a frame to support thc engine and all the operatingmechanism. Upon this frame, A, is mounted a longitudinal frame, B, whichis secured to frame, A, by trunnions or journals, a', so that the frame,B, and with it the engine and all its attachments may be set at anydesired angle in a vertical plane, the slotted segment, O, andset-screw, t, serving to secure and hold it in place, when set in anydesired position for operation. Resting upon this frame, B, is stillanother frame, C, arranged to slide to and fro thereon, as hereinaftermore fully explained. D represents the cylinder of the engine, having aplate, K, attached to its upper side, by means of which 4it is securedto or rathersuspended within the frame, C, as shown in figs. 1 and 2,the cylinder being located near the rear end of the frame, Cf A rod, G,is mounted in supports, I, on one side of frame B, as shown in fig. 2;and to this rod the engine and frame, O., are pivoted on one side by theears, L, which project from plate Kfor that purpose. By this arrangementit will be seen that the frame, C, with the engine and all the mechanismattached can be swung over to one side, as shown in fig. 4, when desiredto remove it from in front of the hole being drilled. F represents a rodor shaft extending from the frontof the valve-chest, H, to thc front endof frame C, and is secured in bearings at each end, which permit it torotate. This shaft, G, has spiral grooves cnt in it on its main portion,as shown in tig. l. An arm, is attached rigidly to the piston of the.

engine, as shown in fig. 1, the upper end of said arm embracing the rod,F, and having projections engaging in the spiral grooves of said rod,I", whereby the latter is caused to rotate, rst in one, `and then in theopposite direction, as the arm, U, plays back and forth thereon, inconnection with thc movements of the piston to which it is attached, aspreviously stated. The rotation of this rod or shaft, F, accomplishesfour distinct purposes:

first, it operates the valve of the engine by means of the arm, U, whichis secured to the valve rod, T, and is y moved to and fro by thespiral'grooves, c', on the rear portion of said rod, G, as shown iniig. 1. At the front end of rod F another set of spiral grooves, v, ismade, inclined in the opposite direction fromthose atvthe rear end, andthese grooves, t', as the shaft rotates, impart a to and fro'movcment t0the block, y, mounted thereon. A rod,f, pivoted at c,vto the bar, E,extends down on each side of the block, z, and is held against a piece,1', pivoted to the block, L, so that as the block, It, moves to and fro,the rods or arms,f, are caused to move with it. The lower end of one ofthe rods, f, engages with a dog, c, secured to a sliding bar, m,therebyv imparting to this bar, m, a sliding movement to and fro. At therear end this bar is forked, or has an arm attached to it and inclined,as shown in thc detached iig. 5."-This inclined arm, 11, ofthe rod, m,works in a hole in the plate, K, directly opposite, and partially underthe ratchet-wheel, T, as shown more clearly in iig. 2. As the rod, m,moves forward, the inclined arm, b', rides up on the plate, K, causingthe rear end lof bar m to rise and turn the wheel, T, in the teeth ofwhich it engages bythcse means the wheel, T, which has an internalscrew-thread corresponding with the thread of rod Gr, is caused to feedthe frame, C, with the engine, forward on frame B, gradually at eachstroke of the piston; a crank, R, at the rear end of G, serving to runthe frame, C, and engine back again, when necessary. P represents adrill, which is secured looselyin suitable bearings attached to thefront end of the frame, C, directly in line with the piston. A collar,p, is attached to the drill, and the lower ends of the rods, f, engagein this collar, and as they move to and fro, they impart the samemotions to the drill. The drill, P, is not connected to the piston, but,instead, the latter is provided at its front end with a hammer, M, whichlat caeh stroke imparts a blow to the end of the drill, I). It will thusbe seen that as the piston is drawn back, the drill is also raised fromthe bottom of the hole, and is again carried back to its position as thehammer delivers its blow. The drill, I), is held in a collar, zu, whichis secured to the front portion of the frame, C, and which has a squarehole in it to receive and hold thelshank of the drill, which is alsomade square at that part. This collar is cut away at one side of thefull diameter of the hole, thus leaving an opening in the Side of thecollar by which the drill, I), can be inserted or removed from thecollar at pleasure. In order to give to the drill the necessary rotarymovement, the collar, w, which holds it, is provided with a series ofprojections or teeth on its periphery, as shown in figs. 1 and ll. Anarm, Y, is pivoted to the rear side of theeOlIar, t0, and extends uppast the front end of rod F, where-it vis connected by a pin, a, Workingin a slot therein, to a disk, F', attached rigidly to the end of shaftF. The pin, a, is placed eccentric to the axis ot shaft F, whereby, asthe shaft moves, i't imparts a crank movement to the pin, a, and this inturn gives a to and fr-o motion to the arm, Y. Another arm, e, ispivoted to the upper end of the arm, Y, and has attached to its lowerend a pawl, o, shown in dotted lines in iig. 4, which pawl engages withthe teeth on the periphery of collar w, a spring, z', serving to heeplthe pawl, 0, up to its work, except when thrown out of connection by theelbowlever, 6. A similar pawl, n, is pivoted on one side of the frame,C, in proper position to also engage in the teeth of the collar, w, forthe purpose of holding the collar, while the pawl, o, is being carriedback to get a fresh hold on the collar. It will, thus be seen that thesainemovoment of the shaft, F, that works the valve of the engine, alsofeeds the engine forward at each stroke, draws back and partiallyrotates the drill, and then carries the drill back to the bottom of thehole ready to receive the blow of thevhammer.

The drawings represent an engine one-fourth of the working size,although it is obvious that they may be made of any required size. Theseengines are intended to be used with compressed air, and when so used, Ifind them to give goed results, working-under a pressure of sixty poundsper inch, and making from three hundred to ive hundred strokes perminute. It is, however, obvious that when used in suitable positionsthey may he' opera-tedby steam, if desired, and at such pressure andspeed as may be required. By mounting it on trunnions, as shown, it canbe readily adjusted to drill holes in any desired position overhead, inthe vertical face of rock, or underneath. By hinging the machine and itssliding frame, kas described, it can be readily swung away from thehole, and'thus permit the drill to be inserted or removed, and also toremove the detritus without vdisturbing the framework or foundation. Bythis method of constructing my drilling machine, I am enabled toproducea machine that operates with great rapidity, and in a mostperfect manner.v

Having thus described my invention, what I claim, is l l l. I claim, indrilling machines ofthe character above described, so arrangingl thecylinder' and its attachments that the same shall be fed up to theirwork, substantially as Aset forth. l

2. Mounting the cylinder and its attachments upona horizontal frame,hinged to the side of the main frame, so that the drilling mechanism maybe swung out of line with the hole being drilled without removing l themain frame, as set forth.

3. Arranging the cylinder in such a manner as to operate the drill by ablow direct from the end of the piston, substantially as set forth.

4. The rod F, or its equivalent, arranged to operate substantially asset forth.

5. The drill-holding device, with the opening in its side to permit theinsertion or removal of the drill, as and for the purpose set forth. l

6. The bar m arranged to operate the ratchet-wheel T, for the purpose offeeding the machine forward, substantially as described.

7. The mechanism so arranged as to raise the drill from the rock at itscutting point, and return it again at each blow' of the hammer, asherein described.

C. D. FOOTE.

Witnesses:

J. H. EARNST, H. M. HARTWELL.

